Door lock



March 24, 1925. 1,530,524

F. RYMARZ DOOR LOCK File'd Ap'iil 28, 1924 2 SheetsSheet 1 Mum!" "m.

if LACE,

LE EL GE 1 i.

I MIGI'EIGAN,

1%: RANK HEAR" it .Kno W21 the (X190 retracted when a door knob is turned in one direction or the other. On the barrel are lugs 22 and with the former engaging a pin 24 of the yoke 19 and the latter engaging the upper pivoted ends 25 of keyhole plates 26 and 27 which are suspended from a pin 28 on the yoke 1.9. If the knob spindle 21 is turned clockwise or counterclockwise the latch 15 will be retracted but in either instance one or the other of the keyhole plates 26 or 27 is adapted to be swung into an active position to guard or close the inner end of the circular keyhole 29 in the side plates or walls of the lock casing. This is brought about by providing the keyhole plates 26 and 27 with slots 30 for a fulcrum pin 31 of the lock casing and arranging the keyhole plates the reverse of each other, that is, with onset said keyhole plates adapted to swing away from the keyhole 29 at one side of the lock casing when the other keyhole plate is brought into active position to close the keyhole at the opposite side of the lock casing. This is best shown in Figs. 5 and 8 where the keyhole plate 26 closes the, keyhole 29 at one side of the lock casing and the keyhole plate 27 is to one side of the keyhole 29' at the opposite side of the lock casing, thus permitting of the key being inserted in the lock casing to abut the keyhole plate 26. The keyhole plates have'the action of pivoted shutters within the lock casing and by holding one of the shutters against movement the other is also held against actuation as will hereinafter appear.

The lock casing 6 has studs 32 in the lower part thereof and slidable on said studs is a lock bolt 33 which extends into a bolt opening 34 in the face plate 9 of the lock casing.-

The lock bolt 33 has a substantially oval shaped opening 35 and the upper wall of said opening has a key notch 36. Above and below the opening 35 are keeper lugs 37 extending into one or the other of two communicating seats provided therefor in each tumbler 39, said tumblers being disposed parallel to the lock bolt and pivotally supported on studs carried by the lock casing. The tumblers 39 are spring pressed by lint springs 40 and 41, the forn'icr engaging the bottom wall of the lock casing 6 and the latter engaging the post 11, so that tho tumblers will be pressed towards each other and normally in engagement with the keeper lugs 37.. With the keeper-lugs 37 in one sct of the tumbler seats 58 the lock bolt 33 will be held in a retracted position, as shown in Fig. 5, and when in the other set of tumbler The tumblers 39 have the confronting edges thereof provided with cam surfaces 42 adapted to be engaged by a key.

The key comprises a barrel 43 and recipro cable in said barrel is a plunger-'44 having a key handle, 45 and a reduced portion 46, said reduced portion being encircled by a coiled expansion spring 47 seated on an annular shoulder 48 of the barrel, so that the expansive force of the spring will tend to force the plunger 44 out of the outer end of the barrel. On the inner end of the plunger are pii'oted retractible mcmbers'49 having teeth 50 and shoulders 51. The retractible members 49 are disposed side by side on a common pivot 52 and one of said members has a stop lug 53 which will allow the members to be brought into parallelism for partial enclosure by the barrel 43, but prevent the members 44 from being spread other than in a defined way when the key is placed in the lock casing.

Considering the operation of the lock mechanism, and assuming that the lock bolt 33 is in a retracted position, as shown in Fig. 5, the door 8 can be opened and closed by using the latch 15 in the usual way, but each and every time the latch 15 is retracted, one or the other of the keyhole plates 26 or 27 is actuated. With the lock mechanism in the condition shown in Fig. 5, the plate 26 is in position to serve as an abutment for the key, when inserted in the keyhole 29, for instance at the inner side of the door. As the key encounters the plate 26 and is pushed inwardly the members 49 are spread apart to assume an opposed relation, somewhat like a cross head on the inner end of the key. The distension of the members 49 is caused bythe key being forced inwardly against the keyhole plate 26 and by retaining pressure on the key and turning it in a clockwise direction, the shoulders 51 of the members 49 separate the tumblers 3.) by engaging the cam surfaces 42. lVith the tumblers separated, as shown in Fig. 4, the tumbler seats 38 are moved away from the keeper lugs 37 and as the key is turned a tooth 50 thereof rides into the notch 36 and retracts the lock bolt 33. As this bolt is retracted-the tumblers 39 shift towards each other and another set of the tumbler seats engage the lugs 37, thus lockin; the bolt in a retracted position.

If the key is lc'l'tin the lock casing, as shown in Fig. 8,, with the keyhole plate 27 engaging one of the mcmbers"49, the latch in cannot be retracted by turning the door knob, consequently the latch will cooperate with the bolt in securing the door against any surreptitious manipulation of the lock mechanism from the outer side of the door. The outer keyhole being closed by the plate 26 prevents a key or instrument from being inserted in the lock casingjl It is thought that the manner of distending the lock bolt by the key will be apparent without further description, and while in the drawings there is illustrated a preferred embodiment of my invention, it is to be understood that the structural elements are susceptible to such variations and modificationsas fall within the scope of the appended claims. v

What I claim is:

1. A door lock comprising a casing having keyholcs, keyhole plates Supported in said casing'and-adapted to be shifted so that one of said plates closes one of said keyholcs, a. latch mechanism adapted to shift said keyhole plates, a bolt, and a key operable by engagement wath one of said keyhole plates for shifting said bolt, said key including contractible members held in active positions by pressure of said key against said keyhole plate.

2. A door lock comprising a casing having keyholcs, keyhole plates supported in said casing and adapted to be shifted so that one of said plates closes one of said key holes, a latch mechanism adapted to shift said keyhole plates, 9, bolt, spring pressed tumblers adapted to hold said bolt in adjusted position, and a. key operatable by engagement with one of said keyhole plates for shifting said bolt, said tumblers being retractible by said key.

3. In a lock mechanism having a bolt and tumblers normally securin said bolt, a casing for said bolt and tumblers, said casing having keyholcs, plates supported in said casing with one of said plates at all times closing one of the keyholcs against the insertion of a key, a key adapted to be insci-ted in the open keyhole and forcibly held against the plate closing the other keyhole, said key being adaptedto operate said bolt and tumblers, and a latch mechanism articulated with said plates and adapted to shift said plates to open one keyhole and close the other.

In testimony whereof I afiix my signature in the presence of two witnesses.

FRANK ltYMARZ.

- Witnesses:

LEWIS E. FLANnens, ANNA M. Donn. 

